Wanna Get Away Cancellation Funds

A few months ago I cancelled a flight that I had purchsed at "Wanna Get Away" pricing and unfortunately had to cancel with the understanding that I would be able to apply those funds to a future ticket.

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I recieved an email with this message:

"Fare Rule(s): 5268529190555: NONREF/NONTRANSFERABLE STANDBY REQ UPGRADE TO Y -BG WN Valid only on Southwest Airlines. All travel involving funds from this Confirmation Number must be completed by the expiration date. Unused travel funds may only be applied toward the purchase of future travel for the individual named on the ticket. Any changes to this itinerary may result in a fare increase. Failure to cancel reservations for a Wanna Get Away fare segment at least 10 minutes prior to travel will result in the forfeiture of all remaining unused funds. "

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The cancellation confirmation email indicated that the expiration date was Jun 5, 2018 - so the funds should still be available.

So here's my question: I am about to purchase another ticket and and hoping to apply those funds to my this ticket. In what point fo the purchasing process can I apply the funds from the previous ticket?

Re: Wanna Get Away Cancellation Funds

FYI: When you book the original itinerary, or change / cancel an existing itinerary, an email is sent that lists the expiration date of the funds for that ticket. This can be helpful if you've made any previous changes or reused funds from another ticket, since the new booking will take on the oldest expiration date of any funds applied.